$ git clone -n https://src.fedoraproject.org/rpms/rust-http-body.git /var/lib/mock/f40-build-2713467-72142/root/chroot_tmpdir/scmroot/rust-http-body
Cloning into '/var/lib/mock/f40-build-2713467-72142/root/chroot_tmpdir/scmroot/rust-http-body'...
$ git fetch origin 2fbe12ad98a07c4f9679e84e6c5c6d75710bf93a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-http-body
 * [new ref]         2fbe12ad98a07c4f9679e84e6c5c6d75710bf93a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fbe12a Update to version 1.0.0; Fixes RHBZ#2249876